My god, you quoted his entire post right under him. awesome.
anyways, back to what the guy asked. You do not need anything else. Your bike will be fine. Just check out everything over real good. Look for loose screws, bad bearings etc. Lube her all up, change the tranny oil and you are ready for some fun.
I dont think different gearing is needed. First gear is pretty low for a stock bike and since your's is already regeared, you are fine. You dont need that fancy of a tire to ride trails. Once the powerband hits, the tires will spin spin anyways. If the dirt it a little damp, that's about the only way you might hook up. That's how it was for me anyways.
Also imo, the hell with all these power upgrades. I think suspension would help you out. What's the fun of riding the shee all day long if it takes a toll on your body. You can get some aftermkart suspension for a decent price. As i said, IMO nothing is needed.
Just dont drag race anybody at all. never. Because if you lose, you will want to get it ported and the money put will start and never stop ::